{"product_id":"starrett-54373-o1-tool-steel-flat-stock-0-25x4-5x36in","title":"Starrett 54373 O1 Tool Steel Flat Stock 0.25x4.5x36in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54373 is an O1 oil-hardening tool steel flat stock blank used in toolmaking, die making, jig fabrication, and precision machining applications. Manufactured from AISI Type O1 oil-hardening tool steel, this flat stock measures 0.25 inches thick, 4.5 inches wide, and 36 inches long, with a finished weight of 11.48 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications requiring close dimensional control before heat treatment. Licensed machinists, tool and die makers, and industrial maintenance professionals work with this material when fabricating custom tooling components that will be oil-quench hardened after machining.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for fabrication of punches, dies, gauges, forming tools, and similar precision components in job shop, production tooling, and maintenance environments. Its 36-inch length provides enough stock for multiple parts from a single piece. The oil-hardening O1 grade machines well in its annealed state, then responds predictably to heat treatment, making it a standard choice when dimensional stability after hardening is critical to the finished part.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel construction for predictable heat-treat response\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches for close pre-machining dimensional control\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.015 inches, zero minus\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch across all edges\u003c\/li\u003e\n\u003cli\u003e36-inch length provides flexibility for multiple part yields per piece\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose O1 oil-hardening tool steel flat stock for toolmaking, die making, and precision fabrication applications requiring an AISI Type O1 material specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMaterial arrives in annealed condition and is intended to be machined prior to heat treatment. Sawing, milling, drilling, and surface grinding are performed before oil quenching and tempering. Follow established heat-treatment procedures and applicable shop safety protocols when hardening. Handle with appropriate lifting precautions given the 11.48-pound stock weight.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Tool Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Specification\u003c\/strong\u003e: AISI Type O1 Oil Hardening\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 36 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness Tolerance\u003c\/strong\u003e: plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.015 inches, zero minus\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge Squareness\u003c\/strong\u003e: 0.003 inches per inch, all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 11.48 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: STARRETT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 54373\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542014689586,"sku":"54373","price":322.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_7f3e41b1-4264-4d97-a858-17b3a714dd66.jpg?v=1785889634","url":"https:\/\/voomisupply.com\/products\/starrett-54373-o1-tool-steel-flat-stock-0-25x4-5x36in","provider":"Voomi Supply","version":"1.0","type":"link"}